package com.imooc.apigateway.filter;

import com.netflix.zuul.ZuulFilter;
import com.netflix.zuul.context.RequestContext;
import com.netflix.zuul.exception.ZuulException;
import org.apache.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;

import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_DECORATION_FILTER_ORDER;
import static org.springframework.cloud.netflix.zuul.filters.support.FilterConstants.PRE_TYPE;

/**
 * TokenFilter
 * 鉴权
 * @author leon.cheng
 * @date 2018/12/13 13:37
 **/
@Component
public class TokenFilter extends ZuulFilter {
    @Override
    public String filterType() {
        return PRE_TYPE;
    }

    @Override
    public int filterOrder() {
        return PRE_DECORATION_FILTER_ORDER-1;
    }

    @Override
    public boolean shouldFilter() {
        return true;
    }

    @Override
    public Object run() {
        RequestContext requestContext=RequestContext.getCurrentContext();
        HttpServletRequest request=requestContext.getRequest();

        //这里从url参数里获取，也可以从cookie,header里获取
        String token=request.getParameter("token");
        if(StringUtils.isEmpty(token))
        {
//            requestContext.setSendZuulResponse(false);
//            requestContext.setResponseStatusCode(HttpStatus.SC_UNAUTHORIZED);
        }
        return null;
    }
}
